cant' get email account to work

I can't seem to make a user email account on huffman.biz, I did make jim@huffman.biz work OK, but I made rosalyn.huffman.biz.

telnet huffman.biz 100
+OK Dovecot ready
USER rosalyn
+OK
PASS luv2do4u
-ERR Authentication failed

Yet jim@huffman.biz works fine...

I'm thinking I'm doing something wrong, but I'm stuck.

Status: 
Closed (fixed)